/Engine/Source/Runtime/Experimental/Chaos/Public/GeometryCollection/GeometryCollectionConvexUtility.h
Get the HasCustomConvex flags. If they're missing, either add them (if bAddIfMissing) or return nullptr
static [TManagedArray](API\Runtime\Chaos\GeometryCollection\TManagedArray)< int32 > * GetCustomConvexFlags ( [FGeometryCollection](API\Runtime\Chaos\GeometryCollection\FGeometryCollection) * GeometryCollection, bool bAddIfMissing )